code: def __repr__(self):
      return "(n={}, mean_mean={}, mean_std={})".format(
          self.n, np.mean(self.mean), np.mean(self.std)
      )
  
imports: import numpy
label_desc: Use image node_id 5 for calling the RunningStat obj's underlying member method code with example usage: obj.__repr__() and returns: str